<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>菜鸟教程(runoob.com)</title>
</head>

<body>

    <h1 id="myH1"></h1>
    <p id="myP"></p>
    <script>
        // 输出标题：
        document.getElementById("myH1").innerHTML = "Welcome to my Homepage";
        // 输出段落：
        document.getElementById("myP").innerHTML = "This is my first paragraph.";
    </script>
    <p><b>注释：</b>注释不会被执行。</p>

</body>

</html>